You're not a computer dummy
Navigating around sites can be confusing.
I'll give it my best shot
Click on your user name--it will take you to "Modify your Profile page" In the column to the LEFT, click on "Forum Profile Information" When the new page comes up, Click on "Add my own picture" Click on "Browse" to find the picture you want. Click on "Open" and the picture will be permanently added.
Underneath all posts it gives an option of "Reply with Quote" Click on that link-when the next page comes up--scroll all the way down under the last "Quote" then add your reply.
I
think this is right. I've not been on BPO all that long, but this path seems to work for me. Maybe someone else has a better/easier/simpler explanation